生态环境学报Issue(1)：14-21,8.DOI:10.16258/j.cnki.1674-5906.2015.01.003
孑遗植物四合木(Tetraenamongolica)迁地保护中的光合作用日变化特征与生理生态适应性
The Studies on the Photosynthetic Characteristics of the Endemic Relict Shrub Tetraena mongolica Maxim for the ex-situ Conservation
摘要
Abstract
In order to further clarify the photosynthesis and physiological adaptability of relict plant Tetraena mongolica under the condition of ex-situ conservation, instantaneous photosynthetic efficiency is analyzed by applying the LI-6400 photosynthes measurement system and the T. mongolica in the ex-situ conservation area and the diurnal photosynthesis changes of Nitraria tangutorum as well as the growth are determined. The results show that:the growth of T. mongolica seedlings crown is in the order of the core area of Wuhai T. mongolica seedlings (26.48 cm×27.26 cm)>Ordos seedlings (21.27 cm×21.75 cm)>Alxa seedlings (19.25 cm×18.27 cm). There are significant differences (P≤0.01) in growth between the original habitat Alashan seedlings and the Wuhai T. mongolica in the core area planted and also there is a significant difference among the growth of Ordos seedlings (P≤0.05). Under the conditions of ex situ conservation, the photosynthetic rate of T. mongolica seedlings leaves shows diurnal variation of“bimodal” curve. T. mongolica diurnal variation of photosynthesis (Pn) in different test areas, transpiration rate(Tr), stomatal conductance(Gs), intercellular CO2 and concentration show a clear difference. Under the condition of ex-situ conservation, photosynthetic rate of T. mongolica in the original habitat>photosynthetic rate of Ordos T. mongolica seedlings>Alxa T. mongolica seedlings. Furthermore, relict plant T. mongolica, with a higher physiological habitat adaptability and eco-suitability, can be carried eastward from the former ex-situ conservation. But in order to realize “seed to seed” ex-situ to “conserve and represent”, and ultimately to achieve“retention and prevention”of T. mongolica ex situ conservation, the ultimate success of ex-situ conservation of T. mongolica remains to be continued to further research.关键词
迁地保护/生境适宜性/光合作用/保持力/多基因库/四合木Key words
ex-situ conservation/habitat fitness/photosynthesis/retention/multiple genepool/Tetraena mongolica Maxim分类
农业科技引用本文复制引用
智颖飙,王云飞,华宇鹏,红鸽,赵凯,魏玲玲,王强,李红丽,崔艳,路战远,刘珮,叶学华,张荷亮,杨持,刘钟龄..孑遗植物四合木(Tetraenamongolica)迁地保护中的光合作用日变化特征与生理生态适应性[J].生态环境学报,2015,(1):14-21,8.基金项目
国家自然科学基金项目（30160020）；内蒙古科技创新引导基金项目（20121604）；内蒙古创新人才团队基金项目（20120341）；内蒙古自然科学基金项目（2011MS0501）；内蒙古人才开发基金（2014RC1218）项目 （）
